John Edwards says he is trying to represent the “grown-up wing of the Democratic Party,” but he can still let his ($1,000-plus) hair down.

On The Late Show With David Letterman last night, Edwards touted his adult behavior when Letterman asked about personal attacks erupting between Sens. Hillary Clinton and Barack Obama Monday.

Letterman couldn’t resist a swipe - literally - at the candidate.

“Could I just mess your hair up a little bit?” Letterman asked Edwards, who once infamously spent $1,250 on a stylist, including travel costs.

“Has it ever been messed up?” Letterman asked before plunging his fingers in, making a mess of Edwards’ hair as he tried to reciprocate.

Earlier Tuesday, during a taping of The Tyra Banks Show, John Edwards said he “feels like the minority” challenging the popular Clinton and Obama.

“It’s hard to be heard,” Edwards said. “We have a couple of candidates who are good candidates but get an enormous amount of attention and publicity and enormous amounts of money. I’ve got to work really hard.”

The former North Carolina senator and second-time White House aspirant did show that despite his pricey haircuts, his taste isn’t always expensive.

He and Banks shared food from Wendy’s - where John and his wife, Elizabeth Edwards, celebrated their first and subsequent wedding anniversaries.

John Edwards talks politics with Tyra Banks over fast food.